Practice some problems that involve thinking about the conditions for obtaining extraneous solutions while solving radical equations.

Problem

Woo Jin is solving the following equation for x.
7, minus, 4, x, equals, square root of, x, plus, 3, end square root
His first few steps are given below.
Is it necessary for Woo Jin to check his answers for extraneous solutions?
Please choose from one of the following options.